Key telephone set



FIG. 1 is a front elevational view of a key telephone set showing my new design;

FIG. 2 is a rear elevational view thereof;

FIGS. 3 and 4 are respectively top and bottom plan views thereof;

FIGS. 5 and 6 are respectively left and right side elevational views thereof; and

FIG. 7 is a front, top and right side perspective view of the stand with the handset removed from the cradle in the stand and inverted and spaced to one side to show the underside of the handset and the cradle surfaces. 

The ornamental design for a key telephone set, substantially as shown and described. 